Burglar-alarm.



No. 636,089. Patented Oct. 3|, I899. D. L. WARTZENLUFT.

BUBGLAR ALARM.

(Application filed Kay 24, 1899.)

(No Model.)

UNITED STATES PATENT OFFICE.

DANIEL L. WARTZENLUFT, OF KUTZTOWN, PENNSYLVANIA.

BURG LAR-ALARM.

SPECIFICATION forming part of-L'etters Patent 'NO. 636,089, dated October 31, 1899.

Application filed May 24, 189 9 To all whom it may concern.-

Be it known that I, DANIEL L. WARTZ'EN- LUFT, of Kutztown, in the county of Berks and State of Pennsylvania, have invented a new and Improved Burglar-Alarm, of which the following is a full, clear, and exact'description.

This invention relates to electrically-actuated burglar-alarms; and the object is to provide a simple and comparatively inexpensive means for closing an alarm-circuit and actuated by the jarring or breaking of a windowpane, door-panel, transom, or the like.

I will describe-a burglar-alarm embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is an inside elevation of a window, showing my invention as applied thereto. Fig. 2 is a section on the line 2 2 of Fig. 1. Fig. 3 is a side view of an auxiliary circuitcloser employed. Fig. 4 is a front view thereof, and Fig. 5 is a plan view of a yielding contact employed.

Referring to the drawings, 1 2 designate wires, here shown as extended across the lower pane of a window. Mounted to swing on the upper wire 1 is a circuit-closer consisting of a sleeve 3, through which thewire 1 loosely passes, and extended upward from this sleeve is a rod 4, having a weighted end 5, designed to rest normally against the window pane. Extended downward from the sleeve at the inside of the wire 2 and normally out of engagement therewith is a circuit-closing arm 6, and extended upward from the sleeve 3 are circuit-closin g arms 7. This circuit-closer is similar to that shown in my Patent No. 609,640, of August 23, 1898, and operates in the same manner--that is, should the window-pane be jarred or agitated sufli ciently to cause the rod '4 to swing inward and downward the arms 7 will engage with the lower wire 2, and thus close the circuit. Should the glass be broken, permitting the weighted end of the rod 4 to swing outward, the arm 6 will engage with the wire 2, and thus close the circuit.

The wires 1 and 2 are connected at the ends Serial No. 718,026. (No model.)

to auxiliary circuit-closers. These auxiliary circuit-closers consist of levers 8 9, pivoted to lugs extended, respectively, from metal plates 10 11. These plates 10 11 have portions 12 13, which overlap or extend side by side in such manner that should the wire 1 be broken the lever 8 will be moved into engagement with the plate 11 by means of a spring 14, and should the wire 2 be broken the lever 9 will be moved into engagement with the extension 12 of the plate 10 by means of a spring 15. These plates 10 11 are mounted on blocks secured to the window-sash. Mounted on the upper rail of the sash are springpressed contacts consisting of rods 16 and 17, engaging, respectively, with contact-plates 18 19, seated in the window-casing and having wire connections 20 21 with an alarm-bell 22, and arranged in the circuit is a battery 23. The contact-rod 16 is connected by means of a wire 24 with the plate 10, and the contactrod 17 is connected by a wire 25 with the plate 11. Each rod 16 17 is mounted in a frame 26, havingupwardly-turned ends provided with openings through which the rods are movable. The rods are held yieldingly against the contact-strips 18 and 19 by means of springs 27, surrounding the rods and engaging at one end with pins on the rod and at the other end with the frames 26. By providing these springpressed contact-rods and the contact-plates in the window-casing'it is obvious that the window-sash may be moved upward when desired without breaking the circuit, or the window may be locked in a slightly-opened position to permit air circulation, and the circuit will be held complete through the contacts and rods. In operation, should the wire 1 be broken, the lever 8 will be swung by means of its spring into engagement with the plate 1-1,thi1s closing the circuit to sound the alarm.

Should the wire 2 be broken, the lever 9 will i be forced into engagement with the plate 10 to close the circuit, and it is obvious that the same result will be obtained should both wires be broken.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A burglar-alarm, comprising an electric circuit, wires of which are adapted to extend across a window or the like, a circuit-closer IOO carried by one of said wires, auxiliary circuitclosers having connection with said wires and consisting of spring-pressed levers with which the wires are connected, plates on which the levers are mounted, said plates being insulated one from the other, and spring-pressed contacts adapted to be carried by the windowsash and having electrical connection with said plates, substantially as specified.

2. In a burglar-alarm, an electric circuit having wires arranged to extend across a window or the like, a circuit-closer held normally in open position by said Wires and adapted to close upon the breaking of a wire, contacts arranged on the window-sash and consisting of rods mounted in a frame the ends of which have openings through which the rods extend, the said rods being electrically connected with said circuit-closer, contact-strips seated in the window-casing, the said strips being in the alarm-circuit, and springs for holding said rods yieldingly against the contact-strips, substantially as specified.

3. In a burglar-alarm, an electric circuit provided with a circuit-closer held normally in open position, the said circuit having a sliding contact comprising a frame adapted to be secured to a window-sash or the like and having openings in its ends a rod extending loosely through the said openings, a con tact-strip adapted to be seated in the windovw casing and arranged to be engaged by the said rod in all positions of the window-sash and a spring surrounding said rod and arranged to hold it in yielding contact with the said strip, substantially as specified.

DANIEL L. WARTZENLUFT.

Witnesses:

LEWIs FISHER, ARTHUR BONNER, 

